Journey to the Center of the Earth

This church, the Church of Our Saviour (Vor Frelsers Kirke), is mentioned in Jules Verne's book Journey to the Center of the Earth.
In the book, professor Otto Lidenbrock attempts to reach the center of the earth by traveling through a volcano in Iceland. However, while waiting in Copenhagen Otto and his nephew Axel climb the stairs of the Vor Frelsers Kirke.

There are 400 steps to the top and the last 150 wind around the outside of the spire.

Vor Frelsers Kirke (website)
Vor Frelsers Kirke (map)